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TRADE AND OTHER RECEIVABLES POLICIES (Details 3) - USD ($)
$ in Thousands
Mar. 31, 2017
Mar. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Billed $ 268,711 $ 407,275
Unbilled 32,089 25,742
Total trade receivables 300,800 433,017
Other receivables 15,551 17,683
Total trade and other receivables 316,351 450,700
Trade and other receivables, allowance for doubtful accounts (in dollars) (4,559) (6,492)
Total trade and other receivables, net $ 311,792 $ 444,208